Protonic and electronic conductivity of the layered perovskite oxides HCa2Nb3O10 and Ca4Nb 6O19

Thomas I. Draskovic; Tsinghai Wang; Camden N. Henderson; Thomas E. Mallouk

doi:10.1016/j.ijhydene.2014.01.017

Protonic and electronic conductivity of the layered perovskite oxides HCa₂Nb₃O₁₀ and Ca₄Nb ₆O₁₉

Thomas I. Draskovic, Tsinghai Wang, Camden N. Henderson, Thomas E. Mallouk

Research output: Contribution to journal › Article › peer-review

9 Scopus citations

Abstract

The structural and electrical properties of the Dion-Jacobson series layer perovskite HCa₂Nb₃O₁₀ were investigated. Within the intermediate temperature range (200-475 C), the compound undergoes topochemical dehydration to Ca₄Nb₆O₁₉ and, under reducing atmospheres, partial reduction of Nb(V) to Nb(IV). These changes occur upon heating and are not reversed on cooling. Analysis of impedance data shows that the conductivity of Ca₄Nb₆O₁₉ is predominantly electronic under reducing atmospheres, consistent with the behavior of other structurally related mixed-valence layered niobates.

Original language	English (US)
Pages (from-to)	4576-4580
Number of pages	5
Journal	International Journal of Hydrogen Energy
Volume	39
Issue number	9
DOIs	https://doi.org/10.1016/j.ijhydene.2014.01.017
State	Published - Mar 18 2014

All Science Journal Classification (ASJC) codes

Renewable Energy, Sustainability and the Environment
Fuel Technology
Condensed Matter Physics
Energy Engineering and Power Technology

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This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1016/j.ijhydene.2014.01.017

Cite this

@article{85f96ee8dc37482b9eab503c603a19be,

title = "Protonic and electronic conductivity of the layered perovskite oxides HCa2Nb3O10 and Ca4Nb 6O19",

abstract = "The structural and electrical properties of the Dion-Jacobson series layer perovskite HCa2Nb3O10 were investigated. Within the intermediate temperature range (200-475 C), the compound undergoes topochemical dehydration to Ca4Nb6O19 and, under reducing atmospheres, partial reduction of Nb(V) to Nb(IV). These changes occur upon heating and are not reversed on cooling. Analysis of impedance data shows that the conductivity of Ca4Nb6O19 is predominantly electronic under reducing atmospheres, consistent with the behavior of other structurally related mixed-valence layered niobates.",

author = "Draskovic, {Thomas I.} and Tsinghai Wang and Henderson, {Camden N.} and Mallouk, {Thomas E.}",

note = "Funding Information: This work was supported by the National Science Foundation under grant CHE-0910513 . ",

year = "2014",

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doi = "10.1016/j.ijhydene.2014.01.017",

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T1 - Protonic and electronic conductivity of the layered perovskite oxides HCa2Nb3O10 and Ca4Nb 6O19

AU - Draskovic, Thomas I.

AU - Wang, Tsinghai

AU - Henderson, Camden N.

AU - Mallouk, Thomas E.

N1 - Funding Information: This work was supported by the National Science Foundation under grant CHE-0910513 .

PY - 2014/3/18

Y1 - 2014/3/18

N2 - The structural and electrical properties of the Dion-Jacobson series layer perovskite HCa2Nb3O10 were investigated. Within the intermediate temperature range (200-475 C), the compound undergoes topochemical dehydration to Ca4Nb6O19 and, under reducing atmospheres, partial reduction of Nb(V) to Nb(IV). These changes occur upon heating and are not reversed on cooling. Analysis of impedance data shows that the conductivity of Ca4Nb6O19 is predominantly electronic under reducing atmospheres, consistent with the behavior of other structurally related mixed-valence layered niobates.

AB - The structural and electrical properties of the Dion-Jacobson series layer perovskite HCa2Nb3O10 were investigated. Within the intermediate temperature range (200-475 C), the compound undergoes topochemical dehydration to Ca4Nb6O19 and, under reducing atmospheres, partial reduction of Nb(V) to Nb(IV). These changes occur upon heating and are not reversed on cooling. Analysis of impedance data shows that the conductivity of Ca4Nb6O19 is predominantly electronic under reducing atmospheres, consistent with the behavior of other structurally related mixed-valence layered niobates.

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